Interact CardioVasc Thorac Surg 2009;8:557. doi:10.1510/icvts.2008.196220A
© 2009 European Association of Cardio-Thoracic Surgery
eComment: CorBeat trileaflet mechanical full-flow heart valve prosthesis versus native human aortic valves – evaluation of functional performance
Leo A. Bockeria,
Aleksandr Fadeev,
Olga Bockeria and
Osman Makhachev
Bakoulev Center for Cardiovascular Surgery, 121552 Moscow, Russia
St Jude Epic heart valve bioprostheses versus native human and porcine aortic valves – comparison of mechanical properties
We read with great interest the findings of Martins Kalejs and colleagues [1] evaluating new bioprostheses by following the mechanics of the native human aortic valve. There are two good things about bioprostheses. First, they follow the natural structure of native human and reproduce the mode of its functioning. Second, they have a favorable effect on both the physiological blood flow constancy and the shortening of the patient's hemodynamics recovery. Attempts to develop a new bioprosthesis with regard to mechanics of human aortic valve leaflets are worthwhile. But there is still room for improvement in mechanical valves possessing one common disadvantage: they are stenotic due to unnatural design [2]. The imperfection of the design, particularly noticeable when using small size prostheses, has a number of impacts on the patient's hemodynamics. The valve occluder (disc, leaflets) located directly in the blood flow may cause its obstruction and separation, high pressure gradients, etc. Finally, the conventional mechanical valves do not keep the physiological blood flow constancy.
The need for a new valve led the Bakoulev Center to the development of the CorBeat trileaflet mechanical valve prosthesis which is close by its design and mode of functioning to the native human. The all-carbon CorBeat has been specially designed for aortic valve replacement in children and adults with small aortic valves. CorBeat has a three hinge mechanism located on the top of housing. The major design achievement is a free of occluder full-flow orifice area of the prosthesis when leaflets open. In vitro values of effective orifice area of CorBeat were as much as 0.95–0.97 of its geometric values.
The first implantations of the CorBeat trileaflet prosthesis were performed in the Bakoulev Center of Moscow on November 2007 [3], and June–July 2008.
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References
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- Kalejs M, Stradins P, Lacis R, Ozolanta I, Pavars J, Kasyanov V. St. Jude. Epic heart valve bioprostheses versus native human and porcine aortic valves – comparison of mechanical properties. Interact CardioVasc Thorac Surg 2009;8:553–557.[Abstract/Free Full Text]
- Gott VL, Alejo DE, Cameron DE. Mechanical heart valves: 50 years of evolution. Ann Thorac Surg 2003;76:2230–2239.[CrossRef]
- Bockeria LA, Bockeria OL, Fadeev AA, Soboleva NN, Agafonov AV, Melnikov AP, Kuznetsov VO, Nikolaev DA, Makhachev OA, Melnikov DA. The first experience of ‘CorBeat’ prosthetic tricuspid valve in patient with mitral lesion and persistent atrial fibrillation. Ann Surgery (in Russian) 2008;2:25–31.
Related Article
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St Jude Epic heart valve bioprostheses versus native human and porcine aortic valves – comparison of mechanical properties
- Martins Kalejs, Peteris Stradins, Romans Lacis, Iveta Ozolanta, Janis Pavars, and Vladimir Kasyanov
Interactive CardioVascular and Thoracic Surgery 2009 8: 553-556.
[Abstract]
[Full Text]
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